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#include "pieslice.h"
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#include "pieslicelabel.h"
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#include "piepresenter.h"
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#include "qpieseries.h"
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#include "qpieslice.h"
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#include <QPainter>
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#include <QDebug>
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#include <qmath.h>
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#include <QGraphicsSceneEvent>
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#include <QTime>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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#define PI 3.14159265
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#define EXPLODE_OFFSET 20
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QPointF offset(qreal angle, qreal length)
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{
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qreal dx = qSin(angle*(PI/180)) * length;
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qreal dy = qCos(angle*(PI/180)) * length;
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return QPointF(dx, -dy);
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}
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PieSlice::PieSlice(QGraphicsItem* parent)
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:QGraphicsObject(parent),
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m_slicelabel(new PieSliceLabel(this)),
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m_angle(0),
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m_span(0),
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m_isExploded(false)
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{
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setAcceptHoverEvents(true);
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setAcceptedMouseButtons(Qt::LeftButton);
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}
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PieSlice::~PieSlice()
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{
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}
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QRectF PieSlice::boundingRect() const
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{
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return m_path.boundingRect();
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}
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QPainterPath PieSlice::shape() const
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{
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return m_path;
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}
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void PieSlice::paint(QPainter* painter, const QStyleOptionGraphicsItem* /*option*/, QWidget* /*widget*/)
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{
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painter->setRenderHint(QPainter::Antialiasing);
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painter->setPen(m_pen);
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painter->setBrush(m_brush);
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painter->drawPath(m_path);
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}
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void PieSlice::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/)
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{
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emit hoverEnter();
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}
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void PieSlice::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
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{
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emit hoverLeave();
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}
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void PieSlice::mousePressEvent(QGraphicsSceneMouseEvent* /*event*/)
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{
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emit clicked();
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}
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void PieSlice::setPieRect(QRectF rect)
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{
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m_pieRect = rect;
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}
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void PieSlice::updateGeometry()
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{
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prepareGeometryChange();
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// calculate center angle
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qreal centerAngle = m_angle + (m_span/2);
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// adjust rect for exploding
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QRectF rect = m_pieRect;
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rect.adjust(EXPLODE_OFFSET, EXPLODE_OFFSET, -EXPLODE_OFFSET ,-EXPLODE_OFFSET);
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if (m_isExploded) {
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QPointF d = offset((centerAngle), EXPLODE_OFFSET);
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rect.translate(d.x(), d.y());
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}
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// update slice path
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// TODO: draw the shape so that it might have a hole in the center
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QPainterPath path;
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path.moveTo(rect.center());
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path.arcTo(rect, -m_angle + 90, -m_span);
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path.closeSubpath();
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m_path = path;
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// update label position
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qreal radius = rect.height() / 2;
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QPointF edgeCenter = rect.center() + offset(centerAngle, radius + 5);
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m_slicelabel->setArmStartPoint(edgeCenter);
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m_slicelabel->setArmAngle(centerAngle);
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m_slicelabel->updateGeometry();
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//qDebug() << "PieSlice::updateGeometry" << m_slicelabel->text() << boundingRect() << m_angle << m_span;
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}
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void PieSlice::handleSliceDataChanged()
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{
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QPieSlice *slice = qobject_cast<QPieSlice*>(sender());
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Q_ASSERT(slice);
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updateData(slice);
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}
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void PieSlice::updateData(const QPieSlice* sliceData)
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{
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// TODO: compare what has changes to avoid unneccesary geometry updates
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m_angle = sliceData->angle();
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m_span = sliceData->span();
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m_isExploded = sliceData->isExploded();
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m_pen = sliceData->pen();
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m_brush = sliceData->brush();
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updateGeometry();
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update();
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m_slicelabel->setVisible(sliceData->isLabelVisible());
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m_slicelabel->setText(sliceData->label());
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m_slicelabel->setPen(sliceData->labelPen());
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m_slicelabel->setFont(sliceData->labelFont());
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m_slicelabel->setArmLength(sliceData->labelArmLenght());
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m_slicelabel->updateGeometry(); // text size & font modifies the geometry
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m_slicelabel->update();
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}
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#include "moc_pieslice.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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